Brake-shoe.



H- PRIES.

Patented Feb. 22, 1910.

HERMAN PRIES, OFMICHIGAN CITY, INDIANA.

BRAKE-SHOE.

Specication of Letters Patent.

Application filed November 8, 1909.

Patented Feb. 22, 19M).

Serial No. 526,867.

To all whom it may concern:

Be it known that I, HERMAN PRIES, a citizen of the United States, and resident of Michigan City, county of Laporte, and State of Indiana, have invented certain new and useful Improvements in Brake-Shoes, of which the following is a. specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to brake shoes for railway cars, its object being to increase the strength of such devices and to improve ,the character of the wearing faces thereof.

It consists of a structure such as is hereinafter described, and is illustrated in the accompanying drawings, in which- Figure 1 is a central longitudinal section of the brake shoe on a plane perpendicular to its face; Fig. 2 is a perspective of the reinforcing plate used in the shoe; and Fig. 3 is a sectional view taken' on the line 3 3 of Fig. l.

The brake shoe consists of thev body portion 10, usually of gray iron, andthe reinforcing plate 11` the former being cast or chilled upon the latter. The novelty resides in the form of the reinforcing plate which is of a tougher and stronger material than the body of the shoe. The plate 11 is so disposed in the mold that its outer face is substantially flush with the back face of the body portion of the brake shoe, and it is provided with the usual outstanding loop 12, by means of which the shoe may be secured in position for service. The plate 11 has a number of instanding lugs, that is to say, lugs which extend toward the wearing face of the shfoe. These lugs are provided with lateral projections. preferably adjacent their ends, as shown, which serve the double purpose of increasing the anchorage of the reinforcing plate to the body, and of increasing the area of the chilled zones adjacent the face of the shoe. As shown, there is a pair of such lugs, designated 13, 14, at the middle of theshoe, and shown as continuations of the sidewalls of the loop 12, such lugs, therefore, extending longitudinally of the shoe and being located one upon each side of its median line. Each of these lugs has at its inner end a lateral projection 15, 16, such projection extending toward the median line of 'the shoe, thereby leaving space between them to be filled by the molten metal as the body is cast. Two similar sets of lugs 17, 18 and 19, 20, are

located respectively adjacent the two ends of the plate 11, and are transversely disposed wlth reference thereto. A member of each of these pairs of lugs is provided with lateral projections 21, 22, and 23, 24, at their inner ends and directed toward each other, but, however, being spaced apart.

The plate 11 is preferably apertured between the members of each of the three pairs of lugs, as shown at 25, 26,27, and is recessed at its ends, as shown at 28, 29, thereby providing a considerable mass of gray iron between each pair of the lugs, to constitute a strong key, for locking lthe two members of the shoe together. The plate 11 and its appurtenances are sufficiently massive to have marked chilling action upon the iron as it is poured into the mold, and the instanding lugs and their lateral projections extend this chilling action over a very considerable'portion of the area of the face'of the shoe.l These lugs, however, are so disposed that portions of the gray iron at the ends of the shoe, and between the several pairs of lugs, come but slightly under the chilling influence, and, 'as a result, the face ofthe shoe comprises a plurality of zones each of considerable area, of comparatively hard and soft material, and it is found in practice that the braking action of such a shoe is greatly superior to-that of a shoe the face of which is either of substantially uniform density or has comparatively small spots of hardened metal.

I claim as my invention:

1. A brake shoe comprising a body portion chilled upon a reinforcing plate of tougher material, such plate having lugs projecting into the body and provided at their vends with lateral extensions.

2. A brake shoe comprising a body portion chilled upon 'a reinforcing late of tougher material, such plate having lugs projecting into the body and provided at their ends with lateral extensions, such lugs being arranged in pairs and the lateral eX- tensions of each pair projecting toward each other.

3. A brake shoe comprising a body portion chilled u on a reinforcing plate of tougher materlal, such plate `having lugs projecting into the body and provided at their `ends with lateral extensions, such eX- tensions bein arranged in pairs, some thereof extending ongitudinally and others transversely as to the shoe` the lateral projections of the members of each pair of lugs extendf tension of each parprojecting toward each ing toward each other. other, the reinforcing plate being apertured 1f.

4. A brake shoe, comprising a body porbetween the members of each pair of lugs. tion chilled upon a reinforcing .plate of HERMAN PRIES 5 tougher material, such plate having lugs projecting into the body and provided at Witnesses: their ends with lateral extensions, such lugs JN0. W. CARLSON, being arranged in pairs and the lateral exl WILFORD ROBINSON. 

